Waste water filtering device for refuse landfill

Abstract

The invention discloses a refuse landfill wastewater filtering device in the technical field of wastewater treatment equipment, which comprises a rack, a mixing tank is mounted on the rack, a conical water diversion block is fixedly arranged at the center of the mixing tank, and a plurality of stirring rods are uniformly arranged at intervals along the circumferential direction of the mixing tank. The periphery of the mixing tank is sunken downwards to form an annular temporary storage tank, the temporary storage tank is provided with a water outlet, and the temporary storage tank is provided with a water drainage valve for sealing the water outlet; the mixing tank is coaxially and rotatably connected with a U-shaped bracket, one side of the bracket is rotatably connected with a rolling wheel extending into the temporary storage tank, the other side of the bracket is fixedly provided with an air cylinder, and the air cylinder drives a scraping plate extending into the temporary storage tank; the rack is fixedly provided with a water inlet pipe and a feeding pipe which are located over the conical water distribution block, and the rack is further fixedly provided with a motor for driving the support to rotate. The scheme can improve the reaction effect of the wastewater and the coagulant.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment equipment, and in particular to a landfill wastewater filtering device. Background Art

[0002] A landfill is a waste treatment site that is used to treat domestic waste and has an artificial impermeable membrane to prevent the leakage of leachate, and is equipped with leachate treatment facilities and equipment for operation, management and maintenance, and meets hygienic requirements. Landfills are divided into mountain landfills, tidal flat landfills and plain landfills according to different terrain and geological conditions.

[0003] Landfill wastewater, especially leachate, is a high-concentration organic wastewater generated during the landfill process. Its treatment is a complex and important link. Landfill wastewater mainly comes from the infiltration of rainwater and the water contained in the garbage itself. Leachate contains a large amount of pollutants such as organic matter, ammonia nitrogen, heavy metal ions, etc. Its composition is complex and the concentration varies greatly. In addition, the wastewater also contains suspended matter. At present, the suspended matter in the wastewater is removed by chemical coagulation and filtration, that is, coagulants are added to the wastewater to condense the suspended matter into larger particles, and then removed by filtration equipment.

[0004] For example, referring to the prior art CN113860623A, a novel mobile leachate treatment method and equipment, the leachate sewage from the domestic waste landfill is pumped into a mobile primary stripping tank. The aeration and stripping effect of the primary stripping tank can remove the free nitrogen compounds in the leachate to a certain extent, and can achieve the effect of balancing the water quality; step two: the wastewater passing through the mobile primary stripping tank enters the mobile coagulation sedimentation tank equipment, and the suspended matter and other pollutants in the wastewater are removed through the dual effects of adding flocculation agents and natural sedimentation. In this application, only a very small amount of raw steam is required, which greatly reduces the operating costs of the enterprise and reduces environmental pollution; and the first-level DTRO membrane concentrate can be continuously treated, which greatly reduces the amount of membrane concentrate and reduces the recharge amount of the landfill. Specifically, the water flow will be dispersed by the conical water dividing block, and the scattered water flow will be cut by the stirring rod. Then the water flow will be discharged along the stirring rod. Under the action of the rotational torque constructed by the reaction, the rotating block will drive the stirring rod to rotate rapidly, thereby improving the mixing effect of the flocculant and the wastewater, and then the water will be discharged outward through the diversion pipe.

[0005] However, a large number of particles are produced after wastewater and coagulants are mixed. These particles will clog the buffer tank and the diversion pipe after being agglomerated, causing poor drainage of the diversion pipe. Summary of the invention

[0006] The present invention is intended to provide a landfill wastewater filtering device to solve the problem in the prior art that particles agglomerate into agglomerates and become clogged in a buffer tank and a diversion pipe, causing poor drainage of the diversion pipe.

[0007] In order to solve the above problems, the present invention provides the following technical solutions:

[0008] A landfill wastewater filtering device comprises a frame, on which a mixing tank is installed, a conical water dividing block is fixedly provided at the center of the mixing tank, and a plurality of stirring rods are evenly spaced along the circumferential direction of the mixing tank, the outer circumference of the mixing tank is recessed downward to form an annular temporary storage tank, the temporary storage tank is provided with a drain outlet, and the temporary storage tank is provided with a drain valve for closing the drain outlet; the mixing tank is coaxially rotatably connected to a U-shaped bracket, one side of the bracket is rotatably connected to a rolling wheel extending into the temporary storage tank, and the other side of the bracket is fixedly provided with a cylinder, and the cylinder drives a scraper extending into the temporary storage tank; the frame is fixedly provided with a water inlet pipe and a feeding pipe located directly above the conical water dividing block, and the frame is also fixedly provided with a motor for driving the bracket to rotate.

[0009] Working principle and beneficial effects of the present invention:

[0010] In this application, wastewater is added through the water inlet pipe, and the feeding pipe is used for adding coagulant. The wastewater and coagulant flow to the conical water dividing block for dispersion and mixing, and then pass through multiple stirring rods for dispersion, mixing and flowing into the temporary storage tank. At this time, the drain valve is in a closed state. The wastewater and coagulant in the temporary storage tank react to produce a large number of particles, and the particles are mutually cemented into groups. At this time, the rolling wheel is located in the temporary storage tank, and the scraper is separated from the temporary storage tank. The motor drives the bracket to rotate, and the bracket drives the rolling wheel to rotate in the temporary storage tank. The rolling wheel further crushes the cementing group. On the one hand, the wastewater wrapped in the cementing group flows out and further reacts with the coagulant. On the other hand, the wastewater and coagulant that have not reacted completely are rolled and mixed in the temporary storage tank for reaction. After the rolling wheel moves several times in the temporary storage tank, the drain valve is opened. At this time, the cylinder drives the scraper to move downward into the temporary storage tank. The motor drives the cylinder and the scraper to rotate several times through the bracket, and the scraper pushes the crushed cementing group debris through the drain port.

[0011] Beneficial effects of the present invention:

[0012] 1. This scheme uses a temporary storage tank as a place for mixing and initial reaction of wastewater and coagulant. Due to the limited volume of the temporary storage tank, the volume of the cementing group generated by the coalescence in the temporary storage tank is also small. Then the cementing group is crushed into small particles by a rolling wheel, and then the small particles, unreacted wastewater and coagulant are discharged into the wastewater pool. In the prior art, large pieces of cementing groups sink to the bottom and press the unreacted suspended matter on the bottom of the pool and block it, causing this part of the suspended matter to be unable to be flocculated. In this application, these small particles are small in volume and have large gaps between them. At the same time, they are dispersed as wastewater is added, so they will not sink to the bottom and press on the suspended matter in the wastewater to block it, so that the residual wastewater and coagulant can react repeatedly in the wastewater pool, thereby improving the treatment effect;

[0013] 2. The bracket is driven by a motor to rotate, and the bracket drives the rolling wheel to rotate in the temporary storage tank. The rolling wheel further crushes the cementing group. On the one hand, it allows the wastewater wrapped inside the cementing group to flow out and further react with the coagulant. On the other hand, the unreacted wastewater and coagulant are rolled and mixed in the temporary storage tank for reaction, thereby improving the treatment effect.

[0014] Preferably, the motor is a servo motor. The servo motor drives the rolling wheel to roll back and forth, thereby improving the breaking effect on the cementing group.

[0015] Preferably, the scraper has an arc-shaped cross section, which improves the scraping effect.

[0016] Preferably, the rolling wheel is evenly distributed with a plurality of mutually spaced crushing teeth, which crush the cemented mass into larger particles, making it convenient to filter later.

[0017] Preferably, the water inlet pipe and the feeding pipe are provided with flow valves, which control the amount of wastewater and flocculant added to the water inlet pipe and the feeding pipe, that is, when the rolling wheel is rolling, the water inlet pipe and the feeding pipe stop adding wastewater and flocculant.

[0018] Preferably, the water inlet pipe and the feeding pipe pass through the top of the bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the internal structure of a landfill wastewater filtering device of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the structure when the middle scraper is in use;

[0021] Figure 3 for Figure 1 Top view of the mixing tank. DETAILED DESCRIPTION

[0022] The following is further described in detail through specific implementation methods:

[0023] The figure marks in the drawings of the specification include: rolling wheel 1, bracket 2, driving gear 3, motor 4, water supply pipe 5, feeding pipe 6, cylinder 7, frame 8, scraper 9, drain valve 10, stirring rod 11, conical water dividing block 12, mixing tank 13, drain outlet 14, temporary storage tank 15.

[0024] In the following statements, directional words such as "left", "right", "up", and "down" are all based on the directions shown in the diagram. In practice, if the corresponding structures are changed in the same direction based on the directions while keeping the relative positions unchanged, it will not affect the implementation of the plan.

[0025] Embodiment: A landfill wastewater filtration device, such as Figure 1 and Figure 3 As shown, the frame 8 includes a mixing tank 13 fixedly mounted on the frame 8, a conical water dividing block 12 fixedly disposed at the center of the mixing tank 13, and 12 stirring rods 11 evenly spaced along the circumference of the mixing tank 13. The outer periphery of the mixing tank 13 is concave downward to form an annular temporary storage tank 15, the temporary storage tank 15 is provided with a drain port 14, and the temporary storage tank 15 is provided with a drain valve 10 for closing the drain port 14;

[0026] A U-shaped bracket 2 is coaxially rotatably connected to the top of the mixing tank 13, and a rolling wheel 1 extending into the temporary storage tank 15 is rotatably connected to the left side of the bracket 2. A cylinder 7 is fixedly provided on the right side of the bracket 2, and the cylinder 7 drives a scraper 9 extending into the temporary storage tank 15; a frame 8 is fixedly provided with a water inlet pipe and a feeding pipe 6 located directly above the conical water dividing block 12, and the frame 8 is also fixedly provided with a motor 4, which drives a driving gear 3, and a driven gear meshing with the driving gear 3 is fixedly sleeved on the top of the bracket 2.

[0027] In the present application, wastewater is added through the water inlet pipe, and the feeding pipe 6 is used for adding coagulant. The wastewater and coagulant flow to the conical water dividing block 12 for dispersion and mixing, and then pass through 12 stirring rods 11 for dispersion and mixing again and flow into the temporary storage tank 15. At this time, the drain valve 10 is in a closed state. The wastewater and coagulant in the temporary storage tank 15 react to produce a large number of particles, and the particles are mutually cemented and aggregated into a mass. At this time, the rolling wheel 1 is located in the temporary storage tank 15, and the scraper 9 is separated from the temporary storage tank 15. The motor 4 drives the bracket 2 to rotate through the driving gear 3 and the driven gear. The bracket 2 drives the rolling wheel 1 to rotate in the temporary storage tank 15. The rolling wheel 1 further crushes the cemented mass. On the one hand, the wastewater wrapped in the cemented mass flows out and further reacts with the coagulant. On the other hand, the wastewater and coagulant that have not reacted completely are crushed and mixed in the temporary storage tank 15 for reaction. Figure 2 As shown, after the rolling wheel 1 moves several circles in the temporary storage tank 15, the drain valve 10 is opened. At this time, the cylinder 7 drives the scraper 9 to move downward into the temporary storage tank 15, and the motor 4 drives the cylinder 7 and the scraper 9 to rotate several circles through the bracket 2. The scraper 9 pushes the crushed cemented group debris out through the drain port 14.

[0028] In this scheme, the temporary storage tank 15 is used as a place for mixing and initial reaction of wastewater and coagulant. Since the volume of the temporary storage tank 15 is limited, the volume of the cementing group generated by the coalescence in the temporary storage tank 15 is also small. Then, the cementing group is crushed into small particles by the rolling wheel 1, and then the small particles, the wastewater that has not reacted completely and the coagulant are discharged into the wastewater pool. In the prior art, the large pieces of cementing group sink to the bottom and press the unreacted suspended matter on the bottom of the pool and block it, so that this part of the suspended matter cannot be flocculated. In this application, these small particles are small in volume and have large gaps between each other. At the same time, they are dispersed as the wastewater is added, so that they will not sink to the bottom and press on the suspended matter in the wastewater to block it, so that the residual wastewater and coagulant can react repeatedly in the wastewater pool, thereby improving the treatment effect.

[0029] The bracket 2 is driven to rotate by the motor 4, and the bracket 2 drives the rolling wheel 1 to rotate in the temporary storage tank 15. The rolling wheel 1 further crushes the cementing group. On the one hand, it allows the wastewater wrapped inside the cementing group to flow out and further react with the coagulant. On the other hand, the wastewater and coagulant that have not reacted completely are rolled and mixed in the temporary storage tank 15 for reaction, thereby improving the treatment effect. Finally, the drain outlet 14 will not be blocked.

[0030] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

Claims

1. A landfill wastewater filtering device, comprising a frame, a mixing tank mounted on the frame, a conical water dividing block fixedly disposed at the center of the mixing tank, and a plurality of stirring rods evenly spaced along the circumference of the mixing tank, characterized in that: The outer circumference of the mixing tank is recessed downward to form an annular temporary storage tank, the temporary storage tank is provided with a drain outlet, and the temporary storage tank is provided with a drain valve for closing the drain outlet; the mixing tank is coaxially rotatably connected to a U-shaped bracket, one side of the bracket is rotatably connected to a rolling wheel extending into the temporary storage tank, and the other side of the bracket is fixedly provided with a cylinder, and the cylinder drives a scraper extending into the temporary storage tank; the frame is fixedly provided with a water inlet pipe and a feeding pipe located directly above the conical water dividing block, and the frame is also fixedly provided with a motor for driving the bracket to rotate.

2. The landfill wastewater filtration device according to claim 1, characterized in that: The motor is a servo motor.

3. The landfill wastewater filtration device according to claim 2, characterized in that: The scraper has an arc cross section.

4. The landfill wastewater filtration device according to any one of claims 2 to 3, characterized in that: The rolling wheel is evenly distributed with a plurality of crushing teeth spaced apart from each other.

5. The landfill wastewater filtration device according to claim 4, characterized in that: The water inlet pipe and the feeding pipe are provided with flow valves.

6. The landfill wastewater filtration device according to claim 5, characterized in that: The water inlet pipe and the feeding pipe pass through the top of the bracket.

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